What problem does your idea solve?
If you sign the petition on the acutal website, poeple have no feedback, no visual representation of their voice and there is nothing interesting on the side that makes people send this link to friends.
How does your idea solve the problem?
With the rubber boat people have the possibilty to post a photo and to scroll along the boat to see who has allready signed the petition. It's fun and it will gain a lot more attention in public media. When people sign, for some moments they are on the first place in the boat. That is a kind of recompense.
Which (communication) means are necessary to turn your idea into a reality?
Some simple changes on the savethearctic.org website.